Apparatus and method for making pulp or the like



July 19, 1932. D. B. WHISTLER APPARATUS AND METHOD FOR MAKING PULP OR THE LIKE Filed May 31, 1928 3 Sheets-Sheet 1 "s I $4., IllllllllllllllllllllllllHllllllllllllllllllll 4 V f v 5 T Z9 63 34 8 'July 19, 1932. B wl-HSTLER 1,868,299

APPARATUS AND METHOD FOR MAKING PULP OR THE LIKE Filed May 51, 1928 5 Sheets-Sheet 2 July 19, 1932. D. B. WHISTLER 1,868,299

APPARATUS AND METHOD FOR MAKING PULP OR'THE LIKE- Filed May 51, 1928 3 sheets-sheet 5 IN VE Patented July 19, 1932 UNITED STATES PATENT OFFICE DAVID B WHISTLER, OF DAYTON, OHIO, ASSIGNOR 1'0 THE BLAOK-GLAWSON GOI- PANY, OF HAMIL'IVN, OHIO V APPARATUS AND METHOD FOR MAKING PULP OR THE LIKE Application filed m a1, 1928. Serial m asreaa.

This invention relates to im rovements in apparatus and method for ma 'ng pulp.

' In the accompanying drawings which serve for illustrating the invention:

Fig. 1 is a plan view of a stock beater equipped with an attachment for removing foreign materials from the raw stock;

Fig. 2 is a detail sectional view of Fi 1.

Fig. 3 is a sectional view-similar to Fig. 2

showing a modification.

Fig. 4 is a plan view of the apparatus including a prehydrating tank for the row stock;

Fig. 5 is a sectional view on line 5 5 of Fig. 6 is a detail plan view similar to Fig. 4 with the operating parts removed;

Figs. 7-8 are detail views of parts of the mechanism.

In making pulp from old paper and rag stocks with ordinary reduction apparatus, irreducible foreign matter in the stock, as scraps of metal, glass, etc., commonly designated as junk, settles in the stock heater and other units of the machinery and interferes with production. The accumulation of the junk necessitates frequent shutting down of the machinery for removing it. This hindrance and retardation of reduction is of of production very materially and is besides a disagreeable condition from the'viewpoint of manual labor required for removing the junk from the reduction apparatus.

In recent years junk removers operably associated with the stock beater, or breaker, have come into extensive use and have been helpful towards effecting more favorable conditions of operation and increasing production.

' An object attained in the present invention consists in providing means for breaking up the bales or mass of raw stock, for pre-hydrating the stock, and incidentally, for removing therefrom the greater portion of the foreign materials which settle in the hydrating tank before the stock is delivered into the beater or breaker, i

A further object attained in the invention 50. consists in also providing improved means .such consequence that it influences the cost operably associated with the stock beater for removing any portion of the junk remaining in the stock as delivered to the beater from eludes .an ordinary stock beater comprising the tub 1, beater roll 2, midfeather 3, beater roll shaft 4.-, and belt drive pulley 5, the showing in the drawings of these parts being more or less conventional for illustrating the relation of the junk removing attachment thereto.

The junk remover which-is here shown in two units, consists of outward cylindrical extensions 6 of the beater tub, forming wells 7 which extend substantially below the beater tub bottom which communicates with the wells by downwardly inclined recesses 8, and apertures 9 opening into the wells. Supported rotatably in each of the wells is a vertically extended feed screw 10 which is supported at its lower end in a bearing 11, at its upper end in a bearing 12, and is connected to the beater roll shaft by gears 13-14, a shaft 15 and gears 16-17. The gears may be at any ratio one to another for effecting the desired speed of the feed screw.

It will be seen that junk settling in the beater tub will be washed by the mass movement of the stock in process of hydration and beating therein into the inclined recesses 8 in the bottom of the tub and thence into the wells 7 where it will be taken up by the feed screw and discharged at the sides of the well through a chute 18 into any suitable receptacle for receiving it. The bottoms of the wells 7 are provided, as here shown, with annular grooves 19 into which fingers 20 at the lower, forward edge of the feed screw ex-.

tend, the arrangement serving to aid the feed screw to take up the junk and to prevent clogging in the bottom of the well.

beater tub, only white water, or water having a small percentage of fine pulpsuspended.

therein, enters the junk wells. The discharge of water from pipes 21, required for hydrating the pulp stock, directed on the unk as it 1s moved upwardon the screw feed, washes off the adhering pulp. 'A port 22 in the beater tub wall between the beater and the well .above the level of the pulp stock in the beater serves for returning the pulp washed from the junk to the beater. p

The modified construction, illustrated in Fig. 3 is like that shown in F'i 1-2, except that the well 23 and feed screw 2 are inclined at a suitable angle for favoring the action of the screw on 'thejunk. Parts 23-34 of the'modified form are'similar in construction and function of operation to the corresponding parts illustrated and described in connection with Figs. 1-2,

The junk remover used' in combination with a fine pulp extractor (not shown) makes a highly effective apparatus for continuous operation in the processes of producing pulp. The continuous extraction or separation of the fine pulp serves to prevent over reduction of the portions of'the stock which respond more readily to hydration and beating, and results in producing a more uniform grade and a better quality of pulp. Fine pulp extractors in various forms are well known in the art and are adapted to be used with the stock beater and junk remover, as herein shown and described, in their'usual construction. I

The apparatus as shown in Figs. 4-8 of the drawings may include one or more of the junk remover units as shown in Figs. 2 or 3 operatively associated direct with the stock beater as .indicated at 6. On the opposite side of the beater, as here shown, is a tank 35 for receiving the raw stock which is broken up from its compact bulk in the bales and subjected to hydration before it passes to the beater, the movement of the stock from the tank 35 to the beater being regulated by a gate 45 according to the requirements. The stock is broken up in tank 35 by opposite sets of breaker blades 36 which are fixed on inclined shafts 37 operable in bearings 5152 of opposite breaker base walls 53 having clearance spaces 54 for the blades 36, the adjacent edges of the clearance spaces acting to prevent clogging of the blades by the stock.

The shafts37 are driven from the beater roll shaft 38 through bevel gears 38-39, 40-41, 42-43, and the gear shaft 44, in opposite directions one-shaft to the other, the blades 36 being arranged on the shafts alterushing the junk wells,.

nately one blade with another of the opposed sets with their planes of rotation intersecting and one set of arms passing through the zone of intersection, as here shown, in uni son with the other. Thus the blades 36 which have dull forward edges 36a act on the stock to break up the bulk of the bales,

and to reduce the mass to a state of uniform hydration before the stock passes through the gate'45 to the beater. r

Breaking up of. he raw stock in the hydrating tank 35 also results in separating therefrom alarge portion of the heavy foreign substances which gravitate to the bottom of the tank which is inclined downward, as here shown, toward the beater, thus causing the junk to move'to the lowest point in the tank and thence through, an inclined passage 46 into'the bottom of a well 47 from which the accumulation is removed by a feed screw 48 in the manner described in connection with the structure shown in Figs; 1-3, the feed screw being operably connected to shaft 44 by gears 49- -50.

Removal of the greater portion of the junk from the raw stock and hydration of the stock before it enters the beater materially facilitates the further reduction in the beater. The removal of the coarser junk in the hydrating tank also has the furtherbeneficial effect of rotecting the blades of the beater roll whic are injured more or less bywith Fig. 4 as being in line one with the other I on their operating shafts and the, opposite sets operating in. unison one set with the other, the blades of each set may be in staggered relation one with another as illustrated in Fig. 8 without materially affecting their action on the stock. In the latter arrangement the load and operating power would be more evenly distributed.

As far as I am aware, the apparatus herein set forth is the first ofits kind in the art which embodies a hydrating tank operably associated with a stock beater, having means for breaking up and hydrating the raw stock and for removing the greater portion of the foreign substances from the'stock before it enters the beater. The development represents a distinct and marked advance in the art of making pulp and I claim the invention, as defined in the appended claims, broadly as to the principal of the apparatus and also as to the method involved in the practice of the invention, irrespective of the specific structure of the apparatus shown in the drawings for illustrating the invention.

I claim as my invention:

1. An apparatus for reducing pulp including in combination with a stock beater, a tank operably associated with the beater, means in the tank for breaking up and hydrating the raw stock before it enters the beater, and means operably associated with said tank for removing foreign substances-separated from the stock incidental to said actions thereon.

2. An apparatus for reducing pulp including in combination with a stock beater, a tank operably associated with the beater, means in the tank for breaking up and hydrating the raw stock before it enters the beater, means in the tank for causing foreign substances separated from the stock incidental to said actions thereon to gravitate to a common level, and means operably associated with the tank for removing said substances.

3. An apparatus for reducing pulp including in combination with a stock beater, a tank operably associated with the beater, means in the tank for breaking up and hydrating the raw stock before it enters the beater, means operably associated" with said tank for removing foreign substances separated from the stock incidental to said actions thereon, and means between the tank and beater for regulating the supply of the stock to the beater.

4. An apparatus for reducing pulp including in combination, a tank operably associated with a stock beater, means in the tankfor hydrating the raw stock including a plurality of sets of rotatable members operably opposed one set to another 'for breaking up the stock, and means operably associated with said tank for removing foreign substances separated from the stock incidental -to said actions thereon.

5. An apparatus for reducing pulp including in combination, a tank operable associated tal to said actions thereon.

with a stock beater, means in the tank for stances separated from the stock incidental to said actions thereon.

7 An apparatus for reducing pulp including in combination with a stock beater, a tank operably associated with the beater, means in the tank for breaking up and hydrating the raw stock before it enters the beater, means operably associated with said tank for removing foreign substances separated from the stock incidental to said actions thereon, and means operably associated with the stock beater for removing therefrom foreign substances remaining in the stock de-- livered'thereto from said tank.

8. An apparatus for reducing pulp includ ing a pre-hydrating tank for raw stock operably associated with a stock beater, means in said tank for breaking'up the raw stocks including a plurality of rotatable blades for breaking up the bulk of the stock and a breaker head coacting with the blades and acting to prevent clogging thereof by the stock. 7

9. A process for making pulp consisting in partially breaking up and hydrating raw pulp stock prior to its reduction to pulp, in removing foreign substances separated therefrom by gravity incidental to, and concurrently with, the hydra-ting and breaking action thereon, in subsequently removing the stock so treated and then subjecting it to a beating action to reduce it to pulp.

10. A process for making pulp consisting in partially breaking up and hydrating raw pulp stock prior to its reduction to pulp,

in removing foreign substances separated therefrom by gravity incidental to and concurrently with the hydrating and breaking action thereon, in subsequently removing) the stock so treated and subjecting it to a ing action to reduce it to pulp, and in further removing foreign substances separated therefrom by gravity incidental to and concurrently with said beating action thereon.

In testimony whereof, I afiix my signature.

DAVID B. WHISTLER.

hydrating the raw stock including a-plurali-- 1 ty of sets of members, each set supported on,

a rotatable shaft inclined downward in the direction of movement of the stock and operably opposed one set to another for breaking upthe stock, and means'operabl associated with said tank for removing oreign' substances separated from the stock inciden- 6. An apparatus for reducing ing in combmation, a tank operab y associated w1th a stock beater, means in the tank for hydrating the .raw stock including a plurality of sets of rotatable members operably connected to the stock beater and operably opposed one set to another for breakin up the stock, and means operably associated ulp includwith, saidtank for removing foreign sub eat- 1'. 

